<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
        <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item>用户管理</el-breadcrumb-item>
        <el-breadcrumb-item>用户列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图区域 -->
    <el-card>
      <!-- 搜索与添加区域 -->
      <el-row :gutter="20">
        <el-col :span="7">
          <el-input placeholder="请输入内容" v-model="queryInfo.query" clearable @clear="getUserList">
            <el-button slot="append" icon="el-icon-search" @click="getUserList"></el-button>
          </el-input>
        </el-col>
        <el-col :span="4">
          <el-button type="primary" @click="addDialogVisible = true">添加用户</el-button>
        </el-col>
      </el-row>
      <!-- 用户列表区 -->
      <el-table :data="userlist" border stripe>
        <el-table-column type="index"></el-table-column>
        <el-table-column label="姓名" prop="username"></el-table-column>
        <el-table-column label="邮箱" prop="email"></el-table-column>
        <el-table-column label="电话" prop="mobile"></el-table-column>
        <el-table-column label="角色" prop="role_name"></el-table-column>
        <el-table-column label="状态">
          <template v-slot="scope">
            <el-switch
              v-model="scope.row.mg_state"
              @change="userStateChanged(scope.row)"
            >
            </el-switch>
          </template>
        </el-table-column>
        <el-table-column label="操作" width="180px">
          <template v-slot="scope">
            <!-- 修改按钮 -->
            <el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditDialog(scope.row.id)"></el-button>
            <!-- 删除按钮 -->
            <el-button type="danger" icon="el-icon-delete" size="mini" @click="removeUserById(scope.row.id)"></el-button>
            <!-- 分配角色按钮 -->
             <el-tooltip effect="dark" content="分配角色" placement="top" :enterable="false">
               <el-button type="warning" icon="el-icon-setting" size="mini" @click="setRole(scope.row)"></el-button>
            </el-tooltip>
          </template>
        </el-table-column>
      </el-table>

      <!-- 分页区域 -->
      <el-pagination
        @size-change="handleSizeChange"
        @current-change="handleCurrentChange"
        :current-page="queryInfo.pagenum"
        :page-sizes="[1, 2, 5, 10]"
        :page-size="queryInfo.pagesize"
        layout="total, sizes, prev, pager, next, jumper"
        :total="total"
      >
      </el-pagination>
    </el-card>

    <!-- 添加用户的对话框 -->
    <el-dialog
      title="添加用户"
      :visible.sync="addDialogVisible"
      width="50%"
      :close-on-click-modal="false"
      @close="addDialogClosed"
    >
      <!-- 内容主体区域 -->
      <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="70px">
        <el-form-item label="用户名" prop="username">
          <el-input v-model="addForm.username"></el-input>
        </el-form-item>
        <el-form-item label="密码" prop="password">
          <el-input v-model="addForm.password" show-password></el-input>
        </el-form-item>
        <el-form-item label="邮箱" prop="email">
          <el-input v-model="addForm.email"></el-input>
        </el-form-item>
        <el-form-item label="手机" prop="mobile">
          <el-input v-model="addForm.mobile"></el-input>
        </el-form-item>
      </el-form>
      <!-- 底部区域 -->
      <span slot="footer" class="dialog-footer">
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addUser">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 修改用户的对话框 -->
    <el-dialog
      title="修改用户"
      :visible.sync="editDialogVisible"
      :close-on-click-modal="false"
      width="50%"
      @close="editDialogClosed"
    >
      <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="70px">
        <el-form-item label="用户名">
          <el-input v-model="editForm.username" disabled></el-input>
        </el-form-item>
        <el-form-item label="邮箱" prop="email">
          <el-input v-model="editForm.email"></el-input>
        </el-form-item>
        <el-form-item label="手机" prop="mobile">
          <el-input v-model="editForm.mobile"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editUserInfo">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 分配角色的对话框 -->
    <el-dialog
      title="分配角色"
      :visible.sync="setRoleDialogVisible"
      width="50%"
      @close="setRoleDialogClosed"
    >
      <div>
        <p>当前的用户:{{userInfo.username}}</p>
        <p>当前的角色:{{userInfo.role_name}}</p>
        <p>分配新角色：
            <el-select v-model="selectRoleId" placeholder="请选择">
            <el-option
              v-for="item in rolesList"
              :key="item.id"
              :label="item.roleName"
              :value="item.id">
            </el-option>
          </el-select>
        </p>
      </div>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRoleDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="saveRoleInfo">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data(){
    //验证邮箱的规则
    var checkEmail = (rule, value, callback) => {
      //验证邮箱的正则表达式
      const regEmail = /^([a-zA-Z0-9_-])+@([a-zA-Z0-9_-])+(\.[a-zA-Z0-9_-])+/

      if(regEmail.test(value)){
        //合法的邮箱
        return callback()
      }

      callback(new Error('请输入合法的邮箱'))
    }

    //验证手机号的规则
    var checkMobile = (rule, value, callback) => {
      //验证手机号的正则表达式
      const regMobile = /^(0|86|17951)?(13[0-9]|15[0123456789]|17[678]|18[0-9]|14[57])[0-9]{8}$/

      if(regMobile.test(value)){
        return callback()
      }

      callback(new Error('请输入合法的手机号'))
    }

    return {
      //获取用户列表的参数对象
      queryInfo:{
        query:'',
        //当前的页数
        pagenum:1,
        //当前每页显示多少条数据
        pagesize:2
      },
      userlist:[],
      total:0,
      //控制添加用户对话框的显示与隐藏
      addDialogVisible:false,
      //添加用户的表单数据
      addForm:{
        username:'',
        password:'',
        email:'',
        mobile:''
      },
      //添加表单的验证规则对象
      addFormRules:{
        username:[
          { required: true, message: '请输入用户名', trigger: 'blur' },
          { min: 3, max: 10, message: '用户名的长度在 3 到 10 个字符', trigger: 'blur' }
        ],
        password:[
          { required: true, message: '请输入密码', trigger: 'blur' },
          { min: 6, max: 15, message: '用户名的长度在 6 到 15 个字符', trigger: 'blur' }
        ],
        email:[
          { required: true, message: '请输入邮箱', trigger: 'blur' },
          {validator: checkEmail,trigger:'blur'}
        ],
        mobile:[
          { required: true, message: '请输入手机号', trigger: 'blur' },
          {validator: checkMobile,trigger:'blur'}
        ]
      },
      //控制修改用户对话框的显示与隐藏
      editDialogVisible:false,
      //查询到的用户信息对象
      editForm:{},
      //修改表单的验证规则对象
      editFormRules:{
        email:[
          { required: true, message: '请输入用户邮箱', trigger: 'blur' },
          { validator:checkEmail,trigger:'blur'}
        ],
        mobile:[
          { required: true, message: '请输入用户手机', trigger: 'blur' },
          { validator:checkMobile,trigger:'blur'}
        ]
      },
      //控制分配角色对话框的显示与隐藏
      setRoleDialogVisible:false,
      //需要被分配角色的用户信息
      userInfo:{},
      //所有角色的数据列表
      rolesList:[],
      //已选中的角色Id值
      selectRoleId:''
    }
  },
  created(){
    this.getUserList()
  },
  methods:{
    async getUserList(){
      const {data : res} = await this.$http.get('users',{
        params:this.queryInfo 
      })
      if(res.meta.status !== 200){
        return this.$message.error('获取用户列表失败！')
      }
      this.userlist = res.data.users
      this.total = res.data.total
    },
    // 监听 pagesize 改变的事件 
    handleSizeChange(newSize){
      this.queryInfo.pagesize = newSize;
      this.getUserList()
    },
    // 监听 页码值 改变的事件
    handleCurrentChange(newPage){
      this.queryInfo.pagenum = newPage
      this.getUserList()
    },
    //监听 switch 开关状态的改变
    async userStateChanged(userinfo){
      const { data : res } = await this.$http.put(`users/${userinfo.id}/state/${userinfo.mg_state}`)
      if(res.meta.status != 200){
        userinfo.mg_state = !userinfo.mg_state;
        return this.$message.error('更新用户状态失败！');
      }
      this.$message.success('更新用户状态成功！');
    },
    //监听添加用户对话框的关闭事件
    addDialogClosed(){
      this.$refs.addFormRef.resetFields()
    },
    //点击按钮，添加新用户
    addUser(){
      this.$refs.addFormRef.validate(async valid => {
        if(!valid)return
        //可以发起添加用户的网络请求
        const {data : res} = await this.$http.post('users',this.addForm)

        if(res.meta.status !== 201){
          this.$message.error('添加用户失败！')
        }

        this.$message.success('添加用户成功!')
        //隐藏添加用户的对话框
        this.addDialogVisible = false
        //重新获取用户的列表数据
        this.getUserList()
      })
    },
    //展示编辑用户的对话框
    async showEditDialog(id){
      const {data : res} = await this.$http.get('users/' + id)
      if(res.meta.status !== 200){
        return this.$message.error('查询用户失败！')
      }
      this.editForm = res.data;
      this.editDialogVisible = true;
    },
    //监听修改用户对话框的关闭事件
    editDialogClosed(){
      this.$refs.editFormRef.resetFields()
    },
    //修改用户信息并提交
    editUserInfo(){
      this.$refs.editFormRef.validate(async valid => {
        if(!valid)return
        //发起修改用户信息的数据请求
        const {data : res} = await this.$http.put(`users/${this.editForm.id}`,{
          email:this.editForm.email,
          mobile:this.editForm.mobile
        })

        if(res.meta.status !== 200){
          return this.$message.error('更新用户信息失败！')
        }

        //关闭对话框
        this.editDialogVisible = false
        //刷新数据列表
        this.getUserList()
        //提示修改成功
        this.$message.success('更新用户信息成功！')
      })
    },
    //根据Id删除对应的用户信息
    async removeUserById(id){
      //弹框询问用户是否显示提示
      const confirmResult = await this.$confirm('此操作将永久删除该用户, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)

      //如果用户确认删除，则返回值为字符串 confirm
      //如果用户取消了删除，则返回值为字符串 cancel
      if(confirmResult !== 'confirm'){
        return this.$message.info('已取消删除')
      }
      const {data : res} =await this.$http.delete('users/' + id)

      if(res.meta.status !== 200){
        return this.$message.error('删除用户失败！')
      }

      this.$message.success('删除用户成功！')
      this.getUserList()
    },
    //展示分配角色的对话框
    async setRole(userInfo){
      this.userInfo = userInfo;
      
      //在展示对话框之前，获取所有角色的列表
      const {data : res} = await this.$http.get('roles')
      if(res.meta.status !== 200){
        return this.$message.error('获取角色列表失败！')
      }

      this.rolesList = res.data
      this.setRoleDialogVisible = true
    },
    //点击按钮，分配角色
    async saveRoleInfo(){
      if(!this.selectRoleId){
        return this.$message.error('请选择要分配的角色！')
      }
      const {data : res} = await this.$http.put(`users/${this.userInfo.id}/role`,{
        rid:this.selectRoleId
      })

      if(res.meta.status !== 200){
        return this.$message.error('更新角色失败！')
      }

      this.$message.success('更新角色成功！')
      this.getUserList();
      this.setRoleDialogVisible = false;
    },
    //监听分配角色对话框的关闭事件
    setRoleDialogClosed(){
      this.selectRoleId = ''
    }
  }
}
</script>

<style lang="less" scoped>

</style>